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Q 1/10
Score 0
Which is the correct unit for rate of reaction?
20
mols-1
dm3mol-1
Jmol-1
gdm-3
Q 2/10
Score 0
The reaction between excess magnesium ribbon and sulphuric acid produces 36cm3 hydrogen gas in 20s. The reaction completes in 2 minutes and the maxiumum volume of hydrogen gas obtained is 80cm3. What is the average rate of reaction at 20s?
60
4.00 cm3s-1
1.80 cm3s-1
0.67 cm3s-1
0.3 cm3s-1
10 questions
Q.
Which is the correct unit for rate of reaction?
1
20 sec
Q.
The reaction between excess magnesium ribbon and sulphuric acid produces 36cm3 hydrogen gas in 20s. The reaction completes in 2 minutes and the maxiumum volume of hydrogen gas obtained is 80cm3. What is the average rate of reaction at 20s?
2
60 sec
Q.
Which of the following reactions has the highest rate of reaction?
3
45 sec
Q.
The following measures can be taken to reduce pollutants from automative industry except?
4
30 sec
Q.
Which statement best explains the meaning of the term effective collision?
5
30 sec
Q.
Na2S2O3(aq) + H2SO4(aq) --> Na2SO4(aq) + S(s) + SO2(g) + H2O(l)
Which of the following is the most suitable method to determine the rate of reaction?
6
60 sec
Q.
Which reaction has the highest rate of reaction?
7
30 sec
Q.
Diagram below shows a graph of the volume of gas released against time for a reaction between calcium carbonate, CaCO3 and hydrochloric acid, HCl.
What is the mass of calcium carbonate used in the reaction?
[Molar volume of gas = 24dm3 mol-1 at room conditions; RAM: C=12, O=16, Ca=40]
8
60 sec
Q.
Table below shows the volume of carbon dioxide gas released at half minutes intervals when hydrochloric acid reacts with marble chips.
What is the average rate of reaction in the second minute?
9
120 sec
Q.
The following equation represents a reaction between 40cm3 of 0.5moldm-3 nitric acid and excess calcium carbonate. The time taken for the reaction to complete is 360s.
2HNO3 + CaCO3 ïƒ Ca(NO3)2 + CO2 + H2O
What is the average rate of reaction?
[Molar volume of gas = 24dm3 mol-1 at room conditions]
